Rigveda 1.151.8
यु॒वां य॒ज्ञैः प्र॑थ॒मा गोभि॑रञ्जत॒ ऋता॑वाना॒ मन॑सो॒ न प्रयु॑क्तिषु ।भर॑न्ति वां॒ मन्म॑ना सं॒यता॒ गिरो ऽदृ॑प्यता॒ मन॑सा रे॒वदा॑शाथे॥
yuvāṃ yajñaiḥ prathamā gobhirañjata ṛtāvānā manaso na prayuktiṣu |bharanti vāṃ manmanā saṃyatā giro 'dṛpyatā manasā revadāśāthe ||
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book